$(document).ready(function(){
	var co=new cart({
		add_btn:".add-cart-btn"
	});
});


function cart(obj){
	this.opt=obj;
	var that=this;
	$(document).off("click",that.opt.add_btn).on("click",that.opt.add_btn,function(){
		alert(1234134);
	});
}

cart.prototype={

}